Vehicle safety brake mechanism.



E. V. LAWRENCE.

VEHICLE SAFETY BRAKE MECHANISM.

APPLICATION FILED my 13 1915.

I 271,91 6. Patented July 9, 1018,

4 SHEETS*SHEtT I.

. V, LAWRENCE.

VEHSCLE SAFETY BRAKE MECHANSSM.

APPUCAUON HLED ILILY 13. I916,

Patented J uly 9, 1918.

4 SHEETS-SHEET 3.

sfiu attorney anueul'om /&M

E. V. LAWH'LNM.

VEHICLE sArETvBaAKE MECHANISM.

APPLICATION HLED JULY 13, 19MB Patented uly .L 1918,

EDWARD V. LAWRENCE, OF NEW YORK, N. Y.

VEHICLE SAFETY BRAKE MECHANISM.

- Specification of Letters Patent.

Patented July 9, 1918.

Continuation of application Serial No. 9,150.4, filed February .20.1915. This application filed July 13, 1916.

Serial No. 109,003.

To all whom, it may concern:

Be It known that I, l'lmvann LawnnNcn, a citizen of the United States ofAmerica, and a resident of New York,

,county and State of New York. have invented certain new and usefulImprove ments in Vehicle Safety lirake lllechanism,

.of which the following is a specification. retden stopis being made.

Oneobject-of my invention is to provide an improved brake mechanism ofthe afore said character that shall be simple and durable inconstruction and particularly reliable in operation.

Another object is to provide a brake mechanism that shall be adapted forapplication, not only to a horsedrawn vehicle, but also to a trailerdrawn by a tractor or the load-carrying section of a semi-trailer.

Another object is to provide. a band brake mechanism constituting adistinct article of manufacture and ads ited to be attached to vehiclesof varying sizes'and styles.

Still another object. is to rovide forthe automatic release of the brato when the vehicle is propelled 'in a reverse direction as for example,by the backing of the team or tractor.

Another object is to provide independent means which may be within thecontrol of a the driver, for setting the brakes in case of emergency 1ngoing up hill, or to rest the Horses of the horse-drawn vehicle,

Another object is to provide a brake drum and band that is adopted undernormal conditions to wrap about the drum so as to tighten when the drumturns forwardly, but

is also provided with means for adjusting the parts to cause the band totighten about the drumwhen the drum turns backwardly. Another object isto provide a vehicle btltlie that shall cmbodya lost motionconneetionsuflic'ient to permit a material rota tire Movement of the vehicleWheels in the opposite direction after the brake is set in one directionof wheel rotation, whereby the load ma be started on a hill, forexample, before the brakes are released, without subjecting the team ortractor to an additional burden or overload.

Other objects and advantages of my in vention, including variousimproved structural details of importance, will be set forthhereinafter, and in order that my invention may be thoroughly understoodI will now proceed to describe the same in the following specificationand then point out the novel features thereof in appended claims.

Referring to the drawings,

Figifrc 1 is a side elevation of the forward part of a wagon equippedwith a brake which constitutes one embodiment of my in vention. One ofthe wheels is removed and the axle shown in section to disclose thebrake mechanism.

Fig. 2 is a plan view of the running gear and tongue of the Wagon ofFig. 1.

A portion of the brake mechanism is shown on a larger scale in Fig. 3,which is a sectional plan view corresponding to Fig 2. Figs. 4 and 5 aresectional elevationsof the brake mechanism, taken respectively on thelines 44 and 55 of Fig. 6 which is a front elevation of the brakemechanism.

One of the details of the mechanism is shown in Fig. 7.

Figs. 8 and 9am side and front elevations of :1V modified form ofmechanism particularly adapted for application to a farm wagon.

Fi 10 shows an arrangement of levers whici is applicable to atwo-wheeled onehorse cart, for example, and

Fig. 11 one that is applicable to an ordinary one-horse wagon.

Fig. 12 shows the adaptation of the brake mechanism for use on a trailerwhich is drawn by a motor tractor or the like.

Having special reference to Figs. 1 to 7 inclusive of the drawings.-10represents the axle of a wagon or vehicle of which '11 indicates thewheels and 12 the tongue. Secured to the axle 10 near its respectiveends and between the wheels oi the vehicle, is a pair of clamps 14, towhich links 15 are pivotnlly connected.

While any'snitable clamp may be used, I prefer to employ the clampillustrated in s rings 20 as shown i Figs. 1, 5 and 6.

ny suitable means, however, may be eniployed for supporting the angleiron in its proper position.

The hanger shown comprises a. pair of clamping pieces 21, which arebolted or otherwise fastened to the spring 20, and a bracket'22 having ahooked end 23 at the bottom to engage and support the angle iron 16. Theclampingpieces have toothed or notched outer surfaces, to cooperate withthe notched web of the bracket and are provided with slots 24 to permita bolt 25 to extend through one or both of them. The bracket has aplurality of holes 26 so that any one can be selected and the height. ofthe angle iron 16 adjusts A tube or sleeve 27 is mounted ,on the angleiron 16 and forms a bearing for a pair of preferably hexagonal rockershafts 28 which extend toward the centeraof the sleeve. and near theirends where they e tend beyond the ends of the sleeve they carry brakeapplication levers. of' these levers is' composed of three sections 2M0and 31, the sections 29 and 30 "ngi integral in the arrangementillustrated a d aflixed to the end of the jacent to the brake to whichthey are connected.' The section 31 is secured to the rocker shaft atthe end of the sleeve 27 but may be integral with the sections 29 and30,

a if desired. The rocker shafts and the sleeve are prevented from beingdisplaced and are at the same time permitted a certain freedom of motionas and forthe purpose hereinafter set forth, by means of stationaryguide brackets 32, which the rocker shafts extend. These brackets arepreferably secured to the angle iron 16 near. its respective ends. Thesleeve 27 and the rocker shafts 28., together constitute an extensiblestructure which is adapted for application to wagons of different sizes.I

.Mounted on the pivot pins 18 by which the links 15 are connected to thebrackets 17, is a pair of bell crank levers 34. Each of these levers issubstantially L-shaped and is pivoted substantially in the center of thehorizontal arm of the L as clearly shown in" Figs. land 5. The other armof the L is made of two spaced members 35 which are attached to thehorizontal arms, and extends 5 upwardly to the rear of the angle iron 16elude springs 45 rocker shaft 28 adhaving ouryed slots 33 through andthe parts mounted thereon. A transverse equalizing bar 36 is connectedby links 37 to the uppezinends of the bell crank levers 34 as clearlyshown in Figs. 1 and'2. This I The tongue 12 is provided withsuspension,

rings 40 in which a bar 41 is loosely mounted. This bar is provided witha ring or a link which 'is adapted to engage the hook 39 and atitsforward end is connected to a chain 42 which extendsaround a sheave 43rotatively mounted near the outer end of the tongue. The free end ofthis-chain is connected to a collar yoke in a well known manner, thearrangement bein such that when the animals are holding acl: the vehicle as it is pushing against them in going down hill or the like, theyexert a pull on the chain =12 which is transmitted through the rod 41,the rod 38, the equalizing bar 36. and the links 37 to the levers 34.The book 39 is composed of a hinged holdin member which is normally heldin the position shown in Fig. 1- by a small loop or clevis 4.4, but isarranged to be readily released to permit the tongue to be; removed orto disconnect the rod 41 fromthe rod 38 for any cause.

The lower arms of the levers 84 are connected by chains 45 whichpreferably inand links or shackles 46 to the middle point ofan evener47, the arran einent bein such that when the horses pul forward. t epull will be transmitted through the shackles 46 and the, chains '15 tothe lower arms of the lever 34. v

As clearly shown in Fig. 5. the levers 34 do not serve directly toeitherset or release the brake which com rises drums,4,8 bolted to thespokes or ot erwise aflixed to the wheel, and brake bands 50 which arewrapped about the drums. v

The sections 29 and 30 of each actuatin lever are connected-to the resective ends 0 the adjacent brake band he connection between the upperend of the band and the lever section 29-15 established by a link 51which has a nut or adjustable head 52 at one end to engage a. bifurcatedhook 53 on the band. l

The leyer sections 81 parts pf he lever 34 and are provided with emslots 4. These slots arepreferabIy formed wit two branches as shown inFigs. 1 and 5. in orderthat the mechanism may be adapted to set thebrake independently of the action of the team aszhereinafter explained.The lower endsof the'brakebands which are connected to the leversections 30 are held relatively stationary and tend to extend betweenthe i pull the rocker shafts 28 downwardly therey seating 'the shaftsand the sleeve 27 in which they are mounted, firmly against the bottomsof the slots 33, in brackets 32 when thevehicle is moving forward andthe brakes are applied.

Each of the levers 34 has a transverse pin 56 which extends thrdugh thecam slot 54 of the adjacent lever section 31. The action of the brakeapplication levers having sections 29 30 and 31 and the bell crank lever34, are therefore interdependent and the brake bands are set andreleased by the tilting of the levers 34, which results, as alreadydescribed, from the forces exerted by the animals either in drawing thevehicle forward, or pushing back when it is going forward.

' As already pointed out, the brake band when set, tends to firmly seatthe rods 28 and the sleeve 27 on the brackets 32, but this is true onlywhen the wheel and the brake drum are rotatin in a directioncorresponding to a forwarf movement of the vehicle.

a If the wheel is rotating in the opposite direction, as, for example,when the horses are backing the vehicle,-the action of the levers 34will bethe same as before and will tend toset the brakes, but therotation of the wheel and the brake drums is now such as to carry thesleeve 27 and the rods 28,- and their attached parts, upwardly withinthe slots 33 of the guide brackets 32 and to release the brake.Accordingly, the brake is automatically applied when needed but isreleased when the horses are attempting to back the vehicle. 1 i

The chain -12 after extending over the pulley 43 is connected as shownin Fig. 1 to the pole chants 58 by chains 59, the arrangement being suchthat there is slack in thepole chains near the pole and the force of theteam in holding back is normally transmit ted throu h the chains 59 and42. T chains will, ofcourse; act in the'iisua manner if the hook 30 isreleased or if the brake application mechanism is broken.

In order to lift the weight of the brake band from the drum to preventexcessive wear and uiinecessary friction when the brake is released, Iprefer to suspend the band as shown in Fig. 4 by means of a curved brace60 which is secured to the angle iron 16 and has a stop 61 which isengaged by the lever arm 29 under certain conditions. The brace has ahanger loop or hook 62 which enga es a loop or holder 63 on the band andpre erably has the form of a widc'plate so that it acts as a mud guardand also protects the brake mechanism from being struck by stones,bricksor other mat-,

ter which may fall from the wagon load.

'As above outlined, the lever arm 31 has .the form shown in Figs. 1 and5. the slot 54 heingprovided with a downwardly extendingccction 54 topermit the lever to be pole Y raised and set the brakes even when thehorses are pulling the vehicle forward.

The transverse pin 56 is normally kept from falling into the section5-1" of the slot by means of a spring 64. It will, of course, beunderstood that the pin 56 is in the 0pposite end of the slot when thebrakes are applied by the holding back action of the team andconsequently the s ring is easily made sufiiciently strong to re easethe brake when the team is pulling forward under normal conditions. If,however, as in going up a hill or in emergency cases it is desired toset the brake, a hand lever may be thrown in the direction of the arrow71 and in turning about its pivot 72 will actuate the brake applicationlever (having sections 29, 30 and 31) through links 73 and 73.

There is a lost motion connection such as a pin and slot 7 4 between thelink 7 3 and the lever arm 31 so that the lever may be actuated by theteam independently of the hand-operated mechanism. Except for the stop61 the brake could not be asefi'ectively applied when the wheels wererotating backwardly or tending to rotatein a backward direction as whenthe load is standin on a hill. This stoo is so located that it cos notinterfere with the operation of the brake under other conditions, butis'engagcd by the end of, the lever section 29 when the lever section 31is lifted by the application of the hand lever 70. The fulcrum of thebrake ap plication lever (having sections 29, 30 and 31) is-thus shiftedfrom the rocker shaft to the outer end of thesection 29 and the upwardpull on the lever section 31 transmitted through the link connection 73wraps the brake band about the drum in the opposite direction from thatin which it is wrapped when the brake is normally applied by the backingof the team; l

Thus the brake band is wrap ed ,in such a way that the turning of the wiecl tends to assist in applying the brake for both directions of wheelrotation.

The operation of the complete mechanism will be understood from thedescription of the operation of the various parts as hereinbeforeoutlined, and will now be briefly discussed as follows :Assuming thatthe parts occupy the positions in which they are 1llustrated in thedrawings and that under these conditions the brake'band is released fromthe drum, the vehicle may be drawn in the usual manner, withoutinterference from thebrakes. If, now, the horses roceed to draw thevehicle forward the pul exerted on the double tree 47 will betransmitted through the shackle 46 and the chains 45 to the lower endsof the levers. This pull will swing the levers slightly about theirpivots 18 and will positively release the brake mechanism.

If it is now i supposed, that the vehicle starts to descend a grade withthe horses holding back, the pull which they exert will be transmittedfrom the collar yoke (not shown) through the chains 58, 59 and 42, rod

' the wheels moving in a forward direction,

the harder the sleeve 27 and the rocker shafts 28 will be resseddownwardly against the bottoms o the slots 33 in brackets 32. There isconsequent] no tendency for the parts to become disp aced.

I i If the'horses agaln exert a forward pull "upon the vehicle, as forexample, when the bottom of the'grade is reached, the brake Willbeimmediately and automaticallyreleasedby the swinging of the levers 34in' the reverse direction. V

The automatic setting of the brakes is, of course, not limited to downhill going and is particularl useful and valuable for stopping sudden y,as for example, when the team is pulled up suddenly at a cross street inthe city,-not onl does the brake increaSe the efliciencyo the rig, butalso acts m a most reliable manner as a safety device for the protectionof foot passengers and other vehicles against accident.

If it is now assumed that the driver wishes to back the vehicle, whenthe horses push backwardly, they exert a pull through the neck yoke andchain 58 as before, to the levers 34, tendin to move them in a clockwisedirection. his tends to set the brakes but as soon as the bands engagethe drums, even to a slight extent, the. backward rotation of the wheelsand the drums .-'mmediately lifts the sleeve 27 and the ro s 28 upWa'r'dly so that the brake application levers (havin sections 29, 30 and31) are swung upwar ly aboutthe pins 56 as pivots, thereby} releasingthe brakes although the levers 341 may continue to occupy the positionswhich would set thebrakes if the, wheels fibre moving in a forwarddirection,

' Having special referenceto Figs. 8 111x19, 8035 the axis, 81 hounds orbeams, 82!, king boltfand 83 a bolster of the vehicle. Mounted'fupon thehounds or beams 81, which form parts of the vfront swivel truck of thevehicle, is); supporting bar 84 which may have the form of an angle ironas shown, and which correspondsto the support 16 of therevioil's-figures. I This bar has rearward 3 extending arms 85 nearitsrespective ends, as shownid Fig. 8,:to which levers 86 are secured andextend downwardly therefrom. These l'e'vers correspond to levers 34 ofFig.

1 and are adapted to tilt the brake applica- The bearings 89 are formedin the offset end brackets 91 of a transverse rod or bar 92 whichextends below the hounds 81 and also avoids interfcrence with any otherpart of the vehicle.

The levers 86 are joined at their lower ends by rigid links 93 to anequalizing bar 94:, the middle point of which is connected by a link 95to the lower end of a lever 96.

The evener of the vehicle is connected to the upper end of this leverand a rod 97 which corresponds to the rod 41 is connected to its lowerend. The arrangement of arts is such that when the vehicle is held ackby the horse when the wheels are turning forward, as in going down hill,or stopping a load, the lever 96 will be pulled forwardly at the bottomof the rod 97 and will transmit motion through link 95, the equalizer 94and the links 93 to the lever 86. These levers when thus actuated willturn the brake 9.0-

tuating' lever sections 29, 30 and 31 about the I shaft 88 as a pivot,and will'set the brakei'n a manner corresponding to that of the brakealready described in connection with the previous figures. When the teamis pulling forward on the vehicle the to 98 is pulled forward and therakes are automatically released, the evener being cohnected to theupper end of the lever 96 as above indicated.

In a one horse vehicle, if the shafts 99 are constructed as a part ofthe body as in some dump wagons, a lever such as 100 of the lever shownin Fig. 10, is mounted on each of the'shafts and is connected at itsupper end to the harness breaching and 'at its lower end byany suitableconnector such as a link 101 to the -lever 86.

If the shafts are moun'tedin the usual brackets 111 (see Fig. 11) levers112 may replace the shafts in the brackets and be connected at theirlower ends to the brake levers 86, the shafifib eing pivotallyconiiected' to the levers 112 at their upper ends. The levers 100 and112 corre spond to lever 96.

The levers 34 are intended as a suitable means for actuating the brakeapplication lever (having-sections 29, 30 and 31) and some' othersuitable means may, of course, be employed to establish the connectiontov the brake application lever, but Pconsider the arrangementillustrated to be referable.

I have for onvenience need he word team to des gnate either one or morelinks 113 horses or animals which may be utilized to draw a wagon.

My invention is not limited to horso drawn vehicles and it is welladapted for use, with trailers or like vehicles which are drawn hy aforward tractor or motor vehicle.

In this connection attention is directed to Fig. 12, in which 120designates a tractor vehicle which may he a motor truck, or a.horsealrawn leading vehicle to which a trailer 121 is coupled. Thetrailer may have a pole, tongue or projection 122 on which a lever 123is pivoted. The upper end of this lever is hooked onto or otherwiseattached to a hook or tail projection lZ-l of the tractor and a hrakeapplication rod 125 is connected to its lower end as is shown in thedrawing.

This application is a continuation in part of my copending applicationS. No. 950+ tiled l ehruary 20, ltllfi, and has been suhst it utedtherefor.

Various structural modilications ma} he ell'ect'ed within the spirit andscope of my invention, and I intend that only such limita tions heimposed as are indicated in the appended claims.

What I claim is:

l. A wagon hrake mechanism comprising a hand brake having a drum securedto the wagon wheel. an actuating lever for applying the hrake. having amovable fulcrum, means dependent upon the. tractive force forautomatieally setting the make. when the wagon is moving forward andpushing against the tractive force. said movahle tulcrmn being adaptedto he displactal when the wagon is moving lmckwardly to prevent thesetting of the hrake when the wagon is heing hacked.

L). wagon hrake mechanism comprising a hand hrake ha viug a drum securedto the wagon wheel. an a tuating lever for apply iug the brake having amovable fulcrum. and a lever having a stationary fulcrum o1 erativelvconnected to the hrake actuating lever and dependent for its action uponthe tract ive force.

2-3. A wagon attachment. comprising a hand hrake having a drum adaptedto he secured to the wagon wheel. an actuating lever for applying thehrake having a mov-v ahle fulcrum. a lever having a stationary fulcrumoperatively connected to the hrake actuating leve' and adapted to hetilted by the t'am when holding hack. the movable fulcrmn of said ln-akeactuating lever heiug adapted to he displaced by the. hackward turningof the wagon wheel to release the hrake indeiendentl of said stationartulcrum lever.

-l. A wagon attachment comprising a hand hrake. an actuating lever forapplvihg the hrake. a =ecmnl lever having a stationary l'ul rumpyratively conn cted to the hrak actuating lever and dependent; for itsaction upon the team. and means for automatlcally releasing the brakehand to permit the backing of the wagon.

in A. wagon attachment comprising a, hrake. an actuating lever forapplying the brake having a movable fulcrum, and means for setting thebrake when the wagon is moving forward, said movable fulcrum beingadapted to be displaced when the Wagon is moving haekwardly to rendersaid means inoperative.

6. In combination with a hand brake, an actuating lever for applying thebrak having a movable fulcrum, means for tilting the actuating lever toapply the brake, said movahle t'ulerum being adapted to be displacedwhen the hand brake drum is rotating in one direction to prevent thesetting of the hrake.

T. A wagon attachment comprising band hrakes having drums adapted to hesecured to a pair of wagon wheels, actuating levers for applying therespective hrakes, an equalizing har connecting the. last named "leversat: one end, means dependent upon the team for exerting a pull upon theequalizinghar when the team is holding hack, and means for automaticallyreleasing the brake when the team is hacking the wagon.

b, wagon attachment comprising hand brakes having drums adapted to besecured to a pair of wagon wheels, actuating levers for applying therespective brakes. an equalizing har connecting the last named levers atone end, means dependent upon the team for exerting a pullulpon theequalizing har when the team is holding back, and a draft mechanismconnected to the opposite end of said levers for releasing the brakeswhen the team pulls Forward.

S). wagon attachment comprising band hrakes having drums adapted to besecured to a pair of iagon wheels. actuatin levers for applying therespective hralc es, an equalizing har connecting the last named leversat onoend, means dependent upon the team for exerting a pull upon theequalizing har when the team is holding hack, drat't mechanism omprisinga douhle tree. ohlique yielding connections from the center of the(ltulllle tree to the, opposite, ends of aid levers. wherehy the forwardpull ol the horses will release the lllilhtS.

ltl. wagon attachment comprising hand hrakes having drums adapted to hesecured to a pair of wagon wheels. actuating levers for applying thehrakes having u'iovahle t'ulcrums. levers pivotally supported adjacentto the tirst-uamed levers and operatlvely connected thereto ha'vingstationary fulcrnms. mean connected to the stationary t'ulei-nm lever atone end for applying lll'tll '.t hell the team holds hack. said movalilclnlcrum eing adapted to be displaced LOO ealing-back of a team when thewheel and brake drums turn backwardly to prevent the setting of thebrakes when the team is backing the wagon.

11. A wagon attachmentcomprising band brakes having drums adapted to besecured to a pair of wagon wheels, actuating levers for applying thebrakes having mova blc tulcrums, levers pivotally supported adpicent tothe first-named levers and operatively connected thereto havingstationary fulcrums, means connected to the stationary fulcrum lev rs atone end for applying brakes when the cam holds back, and a draftmechanism connected to the levers at'theiropposite ends for releasingthe brake when the team 1s pullin forward, said movable fulcrums bemg aapted to bedisplaced when the wheel and brake drums turn backwardly toprevent the setting of the brakes when the team is backing the wagon.

12. A wagon attachment comprising band brakes having drums adapted to besecured to a pair of wagon wheels, actuatin levers for applyingthebrakes having moviihle fulcrums, levers pivotally supported adjacent tothe first-named levers and opcrativcly connected thereto havingstationary fulcrums, means connected to the stationary fulcrum levers atone end for applying brakes when the team holds back, and a draftmechanism comprising an evener, chains connected to the double tree atits middle point and extending obliquely to the stationary fulcrumlevers to release the brake when the team is pulling forward.

13. A wagon attachment comprising band brakes having drums adapted to besecured to a pair of wagon wheels, actuatin levers for applying thebrakes having movable ful crums, levers pivotally supported adjacent tothe first-named levers and operatively connected thereto havingstationary fulcrunis, means connected to the stationary fulcrum leversat one end for applying brakes when the team holds back, and a draftmechanism comprising an evener, chains connected to the double tree atits middle point and extending obliquely to the stationary fulcrumlevers to release the brake Whom the team 1 is pulling forward,saidmovaljf'fulcrumsbeing adaptedto be displaced when the wheel andbrake drums turn backwardly to prevent the settin Y of the brakes whenthe team is backing tie wagon.

14. A wagon attachment comprising a transverse supporting bar, a pair ofindependent pivot'shafts mounted thereon near "the respective endsthereof, brake members,

brake actuatinglevers mounted to tilt on the axes of the respectivepivot shafts, bell crank levers pivotally suspended from the supportingher, and means for connecting the crank levers to be oppositcly influeby thcpullin forwar and holdalnessed into i -the wagon, and an operativeconnection between the bell crank levers and the brake actuating leversdependent u on the direction of wagon whe rotation .01 its brake settingeffectiveness.

15. A wagon attacln'nent con, isin a pair of tilt-able levers, means:lcpen ent upon the pulling forward and holding back action of the teamfor turning the levers in opposite directions on their pivots, brakes. bake actuating levers operatively connemd to the pivotal levers andhaving movable pivots adapted to occupy brake setting and brakeI'Blfiicu: 1g position when the team is holding back, depending upon thedirection of the wagon wheel rotation.

16. A wagon attachment comprising a transverse supporting bar, a pair ofbell crank levers tiltably suspended from the supporting bar near itsends, brake drums secured to the wagon wheels, brake bands surroundingthe drum, 'brake actuating levers mounted to tilt on movable pivotshafts supported by the bar, and means for connecting the ell cranklevers to be tilted in one direction or the other according as thevehicle is being drawn forward or pushed back by the team.

17. A brake mechanism comprising a drum, a band cooperating with. thesurface of the drum, a brake actuating lever supported on a movablepivot, a guide bracket for limiting the motion of said movable pivot, abell crank lever tiltahly supported on a stationary pivot, and a lostmotion connection between the bell crank lever and the brake actuatinglever, whereby a' move ment of the bell crank lever in one directionreleases the brake and the motion of the bell crank lever in theopposite direction sets the brake only in one direction of drumrotation.

18. A wagon attachment comprising a pair of band. brakes having drumsada ted to be secured to a pair of wagon whee a transverse supportingbar ad'acent to the drums guide brackets secure to said bar, anextendible shaft comprising a sleeve, a pair of pivot shafts extendinginto said sleeve and mounted on. said supporting bar in said guidebrackets, brake actuatingdevers aflixed to said shafts, connected to thebrake bands at one end and having cam slots at the other end, a pair ofbell crank.

of the/ins, connected to the ,double fiat its middle point and extendingobliquely to the opposite ends of the bell crank levers whereby aforward pull of the team releases the levers, said pivotal shafts beingadapted to move circnmferentially in said guide brackets when the wagonwheels and brake drums are moving backwardly, to prevent the setting ofthe brakes when the team is backing the wagon.

' 19. A wagon attachment comprising a band brake having a drum adaptedto be secured to a Wagon wheel, a transverse support, a guide bracketthereon, a pivot shaft mounted on the support in the guide brackets, abrake actuating lever affixed to said shaft connected to the brake bandat one end and having a cam slot at the other end, a bell crank leverpivotally mounted on said support adjacent to the brake actuating leverand having a pin extending laterally into the cam slot thereof, meansfor exerting a pull on the bell crank lever when the team is holdingback the wagon, draft mechanism connected to the opposite end of thebell crank lever whereby a forward pull of the team releasesthe lever,said pivotal shaft being adapted to move circiunferentially relative tothe brake drum in. said guide bracket when the wagon wheel and brakedrum 'are moving backwardly to prevent setting of the brake when theteam is backing the wagon.

20. A wagon attachment comprising a hand brake having a drum adapted tobe so cured to a vagon wheel, a transverse support. a guide bracketthereon, a pivot shaft mounted on the support in the guide bracket. abrake actuating lever allixed to said shaft connected to the brake handat one end and having a cam slot at the other end, a bell crank leverpivotally mounted on said support adjacent to the brake actuatinglevcrand having a pin extending laterally into the cam slot thereof, andmeans for exerting a pull on the bell crank lever when the team isholding back the 'agon.

21. A wagon attachment comprisinga pair of band brakes having drumsadapted to be secured to a pair of wagon wheels, a transverse supportingbar adjacent to the drums, guide bracketssecured to said bar, anextendible shaft comprising a sleeve, a pair of pivot shafts extendinginto said sleeve and mounted on said supporting bar in said guidebrackets, brake actuating levers affixed to said shafts. connected tothe brake bands at one end and having cam slots at the other end, a pairof-bell crank levers pivotally mounted on said supporting bar adjacentto the brake actuating levers and hav ing pins extending laterally intothe cam slots thereof, an equalizing bar connected to said bell cranklevers at their upper ends. and means connected to the equalizing barfor exerting a pull on the ar and on the bell crank levers when the teamis holding back the wagon.

22. A wagon attachment comprising a pair of band brakes having drumsadapted to be secured to a pair of wagon wheels, a transverse supportingbar adjacent to the drums, guide brackets secured to said bar, anextendible shaft comprising a sleeve, a pair of pivot shafts extendinginto said sleeve and mounted on said supporting bar in said guidebrackets, brake actuating levers affixed to said shafts, connected tothe brake hands, a pair of levers pivotally mounted on said supportingbar adjacent to the brake actuating levers, and operatively connectedthereto, an equalizing bar connected to said levers, means connected tothe equalizing bar for exerting a pull on the bar and on the levers whenthe team is holding ba k the wagon,

and draft mechanism comprising a double tree. a pair l'llexibleconnectors joined to the double tree at its middle point and eX tendingobliquely to the Opposite ends of the lovers when-Irv a forward pull ofthe team releases the levers. said pivotal shafts being adapted to moverircninferenlially in said guide brackets when the wagon wheels andbrake drums are moving hackwardly, to prevent the setting of the brakeswhen the teain is backing the wagon,

2 A wagon attachment comprising a pair of band brakes having drumsadaptedto be se ured to a pair of wagon wheels. a transverse supportingliar adjacent to 'the drums, guide brackets secured to said bar, anextemlililc shaft comprising a sleeve, a. pair of pivot shafts extendinginto said sleeve and moun ed on said supporting bar in said guidebrackets. brake actuatinglcvers affixed to said shafts. connected to thebrake hands. a pair of levers piiotallv mounted on said snp 'iorting baradjacent to the brake actuating levers and operativeli connectedthereto. an equalizing bar connected to said levers, means connected tothe equalizing bar for exerting a pull on the'bar and on the levers whenthe team is holding back the wagon, draft mechanism connected to the,opposite ends of the levers whereby a for ward pull of the team releasesthe levers,

said pivotal shafts being adapted to move circm'nfercntially in saidguide brackets when the wagon wheels and brake drums are movingluurkwardly. to prevent the setting of the brakes when the team backingthe wagon.

24. A wagon attachment comprising a pair of band brakes having drumsadapted to be secured to a pair of wagon wheels. a

transverse supporting bar adjacent to the in said guide brackets. brakeactuation levers 30 afiixed to said-shafts, connected to the brakebands, a pair of levers pivot'ally mounted on said supporting. baradjacent to the brake actuating levers and operatively connectedthereto, an equalizing bar connected to said levers, and means connectedto the equaliz;

ing bar for exerting a pull on the bar and and a lever adapted to betilted in one. di

rection or the other dependent upon the team and operativcly connectedto the brake set ting means. and hand operated means for actuating thebrake. setting mcanp, sail, brake setting means .being capable o,\1nove- Inent independent of the lever, and means.

dependent upon the backward movement of the wagon for releasing thebrake.

27. A brake com 1 )rising a drum, a band, a brake application leverafiixed to a movable rocker shaft, said band being connected at itsrespective ends to the rocker shaft and to one end of the lever, meansfor turning the le'ver about the center of the rocker shaft as an axisto apply the brake when the drum is rotating in one direction and meansfor displacing the rocker shaftand turning the lever about its end as anaxis to oppositel y wra the band about the drum and apply the brake whenthe drum is rotating in the opposite direction. v

28. A brake comprising a drum, a band, a brake application leverconnected to the respective endsof the band at spaced points in itslength, means for turning the lever about. one of said points as a pivotfor setting the brake in one direction of drum rotation, a stop andmeans for shifting the lever to engage the stop whereby it is adapted tobe turned about the other point as a pivot and set the brake for theopposite direction of drum rotation.

29. A wagon brake mechanism comprising a band brake, an actuating leverconnected to the brake band at two points materially spaced apart, meansdependent upon the backing of the team for turning the lever about oneof said points as a ivot to set the brake for one direction of rumrotation, said lever being adapted tobe displaced to prevent the settingof the brake when the team is backing the vehicle, and means independentofthe team for swinging the lever about the other point as a pivottowel,

the brake for the opposite direction of drum rotation.

30. A wagon brake mechanism comprising a band brake, an actuating leverconnected to the brake band at two points materially spaced apart, meansdependent upon the backing of the team for turning the lever about oneof said points as a pivot to set the brake for one direction of drumrotation, said. lever being adapted to be displaced to prevent thesetting of the brake when the team is backing the vehicle, a sto andmeans independent of the team for displacing the lever so that itengages the stop and is adapted to be swung about the stop as a pivotfor setting the brake when the drum is rotating in a backward direction.

31. A wagon brake mechanism comprising a hand brake, an actuating leverconnected to the brake band at two points materially spaced apart, meansdependent upon the backing of the team for turning the lever about oneof said points as a pivot to set the brake for one direction of drumrotation, said lowibeing adaptedto be displaced to prevent the settingof the brake when the team is backing the vehicle, a stop, and handoperated means for displacing the .lcver to engage the stop and to swingthe lever about the stop as a pivot to wrap the band about the drum inthe opposite irection of rotation.

32. A wagon brake mechanism comprising a hand brake, an actuating leverfor applying the brake having a movable fulcrum and connected at spacedpoints in its length to the respective ads of the hands, a second leverhaving a stationary fulcrum opera tively connected to the brakeactuating lever and dependent for its action upon the team, the fulcrumof said actuating lever being adapted to be displaced automatically toprevent the setting of the brake when the team is backing the vehicle, astop, and means independent of the team for adjusting the lever toengage the stop and to swing the lever about the stop as a pivot wherebythe brake may be set when the vehi h: is moving backwardly.

33. A wagon brake mechanism comprising a band brake, an actuating leverfor applying the brake having a movable fulcrum and connected at spacedpoints in its length to the respective ends of the hands, a second leverhaving a stationary fulcrmn 038F21- tively connected to the brakeactuating ever and dependent for its action upon the team, the fulcru 1of said actuating lever being adapted to be displaced automatically toprevent the setting of the brake when the team is backing the vehicle, astationary stop and a hand lever connected to theiactuating lever'by alost motion connection for adjusting said lever to engage the stop andfor swinging the lever about the stop ,as a

pivot independent of the team to set the brake when the wagon is movingbackwardly.

34. A wagon attachment comprising a handbrake having a drum adapted tobe removably secured to the wagon wheel, an actuating lever for applyingthe brake, having a movable fulcrum, means dependent upon the team forautomatically setting the brake when the wagon is moving forward and theteam is holding back, said movable fulcrum being adapted to be displacedwhen the wagon is moving backwardly to prevent the setting of the brakewhen the team is backin the wagon.

35. 5 Wagon attachment comprising a hand brake having a drum adapted tobe secured to the wagon wheel, an actuating lever for epplyin the brakehaving a mov able fulcrum, u ever havin a statibnery fulcrum operativelconnect to the brake actuating lever an dependent for its action uponthe team.

36. Wagon brake mechanism comprising a brake drum rigidly secured to awagon wheel, a brake member adapted to cooperate therewith, means forsetting the brake, and a lever adapted to be tilted in one direction orthe other, dependent upon the tractive force, and operetively connectedto the brake setting means, said means being adapted to be renderedinoperative by a backward movement of the we on.

In witness whereof, I have ereunto Bob my hand this 12th da of Jul 1916.

EDWAR V, LA ENQE,

